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GSM-60 ENMET Corporation

5.0 Maintenance

The GSM-60

requires periodic sensor calibration and replacement. Calibration of toxic gas and oxygen sensor should be

performed immediately following installation, one month after installation and every 3 months thereafter. HC sensor should be

calibrated on a monthly bases. Oxygen and CO sensor have an estimated lifetime of 1 – 2 years. The CO2 sensor has an

estimated lifetime of 3 years. Other sensors vary. Sensors should be replaced when they will not calibrate or shortly before the

end of the estimated lifetime.

5.1 Cleaning Instructions

AUTION

: Never spray a cleaning solution on the surfaces of the GSM-60 devices.

Clean the exterior of the GSM-60 enclosures with a mild soap solution on a clean, damp cloth. Do not soak the cloth with

solution so that moisture drips onto, or lingers on, external surfaces.

Under no circumstances should organic solvents such as paint thinner be used to clean instrument surfaces.

5.2 Maintenance Menu

5.2.1 Accessing Maintenance Menu

The GSM-60 maintenance menu is accessed by entering the proper password with the

OPTION

and

SELECT

switches. See

Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.

Entrance to the maintenance menu is guarded with a four-digit Password. The factory default setting of the password is 1270.

When a valid numerical password is inserted, the user is allowed to enter the maintenance menu.

To enter the maintenance menu. Press the

OPTION

switch until “Enter Maint Menu” is displayed then press

SELECT

switch for

the Enter Password menu. Enter the valid password as described below.

In the "Enter Maint Menu" position

 Press the

SELECT

switch "Enter Password T 0" is displayed. Press

SELECT

switch once, to move cursor to next digit,

this will be the first digit of the password.

 In the T000 position, the underline cursor is under the left digit.

 Press the

OPTION

switch to change the left digit; select the correct digit.

 Press the

SELECT

switch, which locks the digit in place and moves the cursor one digit to the right.

Continue this process until the four-digit password is complete. When a valid password is inserted in this manner, the display is

transferred to the "Calibration" portion of the menu. If an invalid password is inserted you are returned to the Enter Maint

Menu display.

Example: Password Display (with factory installed password entered) and Flow Chart below.

To Calibration

See Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.

Enter Password

1270

PPM

O = Option Switch

S = Select Switch

H2S

PPM

Enter Password

T0000

Enter Maint Menu

Changes digit indicated by underscore cursor

Locks underscored digit and moves cursor to next digit

(6)

Valid

Invalid

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 38 39

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